What is the "recycling" of automotive tires?
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A few days ago, taxi driver Xu master told this newspaper that he had not been involved in a traffic accident for more than ten years. However, he did not expect that an accident that occurred in the previous few days would have caused a car accident. At that time, the steering wheel ran away to the left, and Master Xu quickly pulled back hard. After getting off the car, it was found that the left front tire of the car had burst, and this tire had been changed for less than a month. Master Xu said: "At that time, I looked very well, and the pattern was quite deep, and the child was not too old. It was a new look. I felt it could make it. The other person said that there was no problem, so I bought this child." The tires that felt very good took a puncture in less than a month, and there was also a car accident. The master Xu also wondered why it was caused.
Yesterday morning, the reporter deliberately visited several roadside small car repair and service shops in the city. As a result, it was found that the newly packaged tires had a rough look. One of the repair shops is selling some tires that are relatively cheap, and the reporter immediately asked how much money a tire asks. The boss said that it was 180 yuan. These tires were only used for ten days and they were sold. cheaper". When the reporter asked if there was any guarantee of quality, the shop owner patted his chest and assured the reporter that there would be no problem in another year or two: “These were all removed from the new car that had just opened, plus our professional refurbishment. There is absolutely no quality problem."
During the reporter’s visit, it was found that most businesses would tell reporters that these tires were only used for more than a dozen days of “advanced new tiresâ€, so they “sold relatively cheaplyâ€. However, after careful inspection, the reporter found many tires. Even the basic marks such as production batch numbers and balance signs are not available, and some tire treads have been almost flattened.
“Nanyang City has a lot of retreaded tires.†On the same day, the reporter interviewed Mr. Zhang (a pseudonym) who had been in business for many years in auto parts business. He told reporters that nowadays, almost every day, people come to his shop to purchase used tires. Nearly 50 yuan, less wear can be sold for 80 yuan, these scrapped tires, was "high-priced" after the acquisition, usually took the renovation. Nowadays, it is the high season of automobile tire puncture accidents, and a large number of inferior retreaded tires have flown into the market to bring great risks to traffic safety.
Identify true and false methods
Then, how do the majority of drivers know how to identify the tyres? Mr. Zhang told the reporter that the method of authenticating the retreaded tyres is very simple: the most common is to observe the color and luster of the tyres, and the color and luster of the retreaded tyres are More bleak. It can also be identified by observing the overlapping parts of the tread and the sidewalls. The lap joint between the tread and the sidewall of the retreaded tire is not as smooth as the new tire.
Followed by press, press the tread with your fingers, if there is no fingerprint left, then meet the quality requirements; you can also pull, the rubber nail on the tread is not easy to pull off, after the release, you can immediately restore the original state; also can draw, With a fingernail on the tread, if no fingerprints are left, the quality requirements are met.
Extensive reading:
How to choose heavy-duty tires?
Heavy-duty truck tires have many models and specifications, and their structures and materials are not the same. When selecting a tire, it is best to select the same tire type and size as the original car. If other types of tires are used instead, consider the following issues:
1. The same car, can not be mixed with different types, different names, different tire structure of the tire, can not be mixed with ordinary tires and anti-skid tires, tire selection on the same axis should pay more attention to this point, otherwise the car steering, stability Worse.
2. The tire's adaption speed and maximum load pressure should be equal to or greater than the original car's tires. Adaptation of low-speed tires to high-speed cars can degrade maneuverability. A tire with a small load pressure has a large amount of deformation, wear is increased, and the vehicle's running resistance is large.
3. The outer diameter of the selected tire should be consistent with that of the original car. If the outside diameter does not match, it will affect the accuracy of the odometer and speedometer. When the section width of the new tire is changed, the flatness rate should also be changed accordingly so as not to change the accuracy of the original odometer.
4. According to the driving conditions of the car, select the appropriate tread pattern.
It has different bulk density, i.e. low density 0.35-0.6g/cm 3 , medium density 0.6-0.8g/cm3 and high density 0.8-1.0g/cm3. This product has two crystalline forms, namely phase I (high temperature phase) and phase II (low temperature phase). The chemical properties of the two phases are the same, and the difference between them lies in the thermostability, hygroscopicity, solubility and hydration heat when dissolving.
It can be used as one of the main auxiliaries for synthetic Detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.
As an oil contamination resistance agent in paper production; As in foodstuff industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. It may also serves as a softener or densifier in foodstuff industry.